Suppose That the Sample Regression Line of the First-Order Model $\hat { y } = 4 + 3 x _ { 1 } + 2 x _ { 2 }$

True/False

Suppose that the sample regression line of the first-order model is $\hat { y } = 4 + 3 x _ { 1 } + 2 x _ { 2 }$ .If we examine the relationship between y and x₁ for three different values of x₂,we observe that the effect of x₁ on y remains the same no matter what the value of x₂.